<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title> Param </title>
</head>
<body>
	
	<form action="HelloServlet" method="get">
		<input name="id" type="hidden">
		<input name="username">
		<input name="password" type="password">
		<input name="age">
		a<input type="checkbox" name="ball" value="a" autocomplete="off">
		b<input type="checkbox" name="ball" value="b" autocomplete="off">
		c<input type="checkbox" name="ball" value="c" autocomplete="off">
		<input type="submit">
	</form>


</body>
</html>